LHC phenomenology of a two-Higgs-doublet neutrino mass model

We study the LHC search prospects for a model in which the neutrinos obtain Dirac masses from couplings to a second Higgs doublet with tiny vacuum expectation value. The model contains a charged Higgs boson that decays to ν with branching fractions controlled by the neutrino masses and mixing angles as measured in neutrino oscillation experiments. The most promising signal is electroweak production of H⁺H^- pairs with decays to ^'pTᵐⁱˢˢ, where ^'=e⁺e^-, μ⁺μ^-, and e^±μ^∓. We find that a cut on the kinematic variable MT2 eliminates most of the tt̄ and W-pair background. Depending on the neutrino mass spectrum and mixing angles, a 100 (300) GeV charged Higgs could be discovered at the LHC with as little as 8 (24) fb^-1 of integrated luminosity at 14 TeV $pp$ center-of-mass energy.